Apparatus for recording, transmission or reproduction of sound or images, in particular compact disc players, DVD players, MP3 players, portable multimedia players, amplifiers and loudspeakers, radios, loading stations for mobile phones and computers; headphones; computer hardware for data processing, computers; magnetic discs, magnetic computer tapes, compact discs, DVDs, all of the foregoing being blank; digital set-top boxes, in particular receiver and decoder for digital media, converters...